/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:47:35,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:47:35,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:47:35,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:47:35,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:47:35,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:47:35,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:47:35,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:47:35,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:47:35,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:47:35,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:47:35,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:47:35,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:47:35,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:47:35,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:47:35,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:47:35,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:47:35,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:47:35,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:47:35,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:47:35,721 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:47:35,747 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:47:35,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:47:35,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:47:35,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:47:35,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:47:35,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:47:35,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:47:35,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:47:35,750 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:47:35,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:47:35,750 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:47:35,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:47:35,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:47:35,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:47:35,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:47:35,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:47:35,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:47:35,751 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:47:35,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:47:35,751 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:47:35,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:47:35,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:47:35,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:47:35,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:47:35,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:47:35,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:47:35,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:47:35,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:47:35,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:47:35,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:47:35,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:47:35,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:47:35,753 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:47:35,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:47:35,753 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:47:35,753 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:47:35,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:47:35,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:47:35,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:47:35,971 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:47:35,971 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:47:35,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label04.c [2023-03-30 23:47:37,013 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:47:37,456 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:47:37,456 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label04.c [2023-03-30 23:47:37,500 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ee26af1f/cf4d285c0d5c483986c1bda969669f9d/FLAG1232f60f6 [2023-03-30 23:47:37,513 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ee26af1f/cf4d285c0d5c483986c1bda969669f9d [2023-03-30 23:47:37,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:47:37,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:47:37,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:47:37,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:47:37,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:47:37,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:47:37" (1/1) ... [2023-03-30 23:47:37,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cfc5053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:37, skipping insertion in model container [2023-03-30 23:47:37,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:47:37" (1/1) ... [2023-03-30 23:47:37,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:47:37,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:47:37,934 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label04.c[8051,8064] [2023-03-30 23:47:38,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:47:38,798 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:47:38,823 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label04.c[8051,8064] [2023-03-30 23:47:39,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:47:39,435 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:47:39,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39 WrapperNode [2023-03-30 23:47:39,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:47:39,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:47:39,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:47:39,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:47:39,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39" (1/1) ... [2023-03-30 23:47:39,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39" (1/1) ... [2023-03-30 23:47:39,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39" (1/1) ... [2023-03-30 23:47:39,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39" (1/1) ... [2023-03-30 23:47:39,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39" (1/1) ... [2023-03-30 23:47:39,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39" (1/1) ... [2023-03-30 23:47:39,687 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39" (1/1) ... [2023-03-30 23:47:39,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39" (1/1) ... [2023-03-30 23:47:39,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:47:39,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:47:39,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:47:39,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:47:39,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39" (1/1) ... [2023-03-30 23:47:39,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:47:39,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:47:39,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:47:39,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:47:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:47:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:47:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:47:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:47:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:47:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:47:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:47:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:47:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:47:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:47:39,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:47:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:47:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:47:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:47:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:47:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:47:39,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:47:40,084 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:47:40,085 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:47:45,864 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:47:45,889 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:47:45,889 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:47:45,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:47:45 BoogieIcfgContainer [2023-03-30 23:47:45,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:47:45,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:47:45,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:47:45,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:47:45,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:47:37" (1/3) ... [2023-03-30 23:47:45,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23146a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:47:45, skipping insertion in model container [2023-03-30 23:47:45,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:47:39" (2/3) ... [2023-03-30 23:47:45,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23146a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:47:45, skipping insertion in model container [2023-03-30 23:47:45,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:47:45" (3/3) ... [2023-03-30 23:47:45,899 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label04.c [2023-03-30 23:47:45,910 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:47:45,910 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:47:45,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:47:45,966 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1a1faa54, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:47:45,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:47:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 23:47:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-30 23:47:45,980 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:47:45,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:47:45,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:47:45,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:47:45,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1541354564, now seen corresponding path program 1 times [2023-03-30 23:47:45,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:47:45,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258623456] [2023-03-30 23:47:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:47:45,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:47:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:46,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:47:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:47:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:47:46,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258623456] [2023-03-30 23:47:46,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258623456] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:47:46,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:47:46,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:47:46,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285163970] [2023-03-30 23:47:46,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:47:46,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:47:46,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:47:46,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:47:46,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:47:46,447 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:47:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:47:58,439 INFO L93 Difference]: Finished difference Result 6480 states and 12299 transitions. [2023-03-30 23:47:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:47:58,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-03-30 23:47:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:47:58,472 INFO L225 Difference]: With dead ends: 6480 [2023-03-30 23:47:58,472 INFO L226 Difference]: Without dead ends: 4635 [2023-03-30 23:47:58,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:47:58,485 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 7753 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 9808 mSolverCounterSat, 2328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7753 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 12136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2328 IncrementalHoareTripleChecker+Valid, 9808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:47:58,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7753 Valid, 493 Invalid, 12136 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2328 Valid, 9808 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2023-03-30 23:47:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2023-03-30 23:47:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 4629. [2023-03-30 23:47:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4571 states have (on average 1.6740319404944213) internal successors, (7652), 4574 states have internal predecessors, (7652), 20 states have call successors, (20), 20 states have call predecessors, (20), 37 states have return successors, (77), 34 states have call predecessors, (77), 19 states have call successors, (77) [2023-03-30 23:47:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7749 transitions. [2023-03-30 23:47:58,662 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7749 transitions. Word has length 68 [2023-03-30 23:47:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:47:58,663 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 7749 transitions. [2023-03-30 23:47:58,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:47:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7749 transitions. [2023-03-30 23:47:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-03-30 23:47:58,672 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:47:58,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:47:58,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:47:58,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:47:58,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:47:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash -603386691, now seen corresponding path program 1 times [2023-03-30 23:47:58,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:47:58,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170970120] [2023-03-30 23:47:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:47:58,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:47:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:58,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:47:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:59,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:47:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:47:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:47:59,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:47:59,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170970120] [2023-03-30 23:47:59,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170970120] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:47:59,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:47:59,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:47:59,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688076928] [2023-03-30 23:47:59,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:47:59,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:47:59,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:47:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:47:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:47:59,124 INFO L87 Difference]: Start difference. First operand 4629 states and 7749 transitions. Second operand has 8 states, 7 states have (on average 20.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:48:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:48:09,084 INFO L93 Difference]: Finished difference Result 10809 states and 17786 transitions. [2023-03-30 23:48:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:48:09,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 20.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 146 [2023-03-30 23:48:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:48:09,104 INFO L225 Difference]: With dead ends: 10809 [2023-03-30 23:48:09,104 INFO L226 Difference]: Without dead ends: 6186 [2023-03-30 23:48:09,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:48:09,112 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 5313 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 11948 mSolverCounterSat, 1993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5313 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 13941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1993 IncrementalHoareTripleChecker+Valid, 11948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:48:09,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5313 Valid, 818 Invalid, 13941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1993 Valid, 11948 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2023-03-30 23:48:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2023-03-30 23:48:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 6137. [2023-03-30 23:48:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6137 states, 6029 states have (on average 1.4795156742411677) internal successors, (8920), 6039 states have internal predecessors, (8920), 26 states have call successors, (26), 26 states have call predecessors, (26), 81 states have return successors, (175), 71 states have call predecessors, (175), 25 states have call successors, (175) [2023-03-30 23:48:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 9121 transitions. [2023-03-30 23:48:09,246 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 9121 transitions. Word has length 146 [2023-03-30 23:48:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:48:09,248 INFO L495 AbstractCegarLoop]: Abstraction has 6137 states and 9121 transitions. [2023-03-30 23:48:09,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 20.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:48:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 9121 transitions. [2023-03-30 23:48:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-30 23:48:09,253 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:09,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:48:09,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:48:09,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:09,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:09,254 INFO L85 PathProgramCache]: Analyzing trace with hash 784182859, now seen corresponding path program 1 times [2023-03-30 23:48:09,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:09,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891717718] [2023-03-30 23:48:09,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:09,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:09,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:09,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:48:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:09,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891717718] [2023-03-30 23:48:09,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891717718] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:09,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:09,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:48:09,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404371936] [2023-03-30 23:48:09,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:09,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:48:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:48:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:48:09,556 INFO L87 Difference]: Start difference. First operand 6137 states and 9121 transitions. Second operand has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 4 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:48:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:48:19,413 INFO L93 Difference]: Finished difference Result 18713 states and 28143 transitions. [2023-03-30 23:48:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:48:19,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 4 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 149 [2023-03-30 23:48:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:48:19,458 INFO L225 Difference]: With dead ends: 18713 [2023-03-30 23:48:19,458 INFO L226 Difference]: Without dead ends: 12582 [2023-03-30 23:48:19,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:48:19,474 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 14123 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 9844 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14123 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 10673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 9844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:48:19,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14123 Valid, 783 Invalid, 10673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 9844 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2023-03-30 23:48:19,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12582 states. [2023-03-30 23:48:19,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12582 to 12184. [2023-03-30 23:48:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12184 states, 11913 states have (on average 1.428859229413246) internal successors, (17022), 11946 states have internal predecessors, (17022), 50 states have call successors, (50), 50 states have call predecessors, (50), 220 states have return successors, (561), 187 states have call predecessors, (561), 49 states have call successors, (561) [2023-03-30 23:48:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12184 states to 12184 states and 17633 transitions. [2023-03-30 23:48:19,686 INFO L78 Accepts]: Start accepts. Automaton has 12184 states and 17633 transitions. Word has length 149 [2023-03-30 23:48:19,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:48:19,688 INFO L495 AbstractCegarLoop]: Abstraction has 12184 states and 17633 transitions. [2023-03-30 23:48:19,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 4 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:48:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 12184 states and 17633 transitions. [2023-03-30 23:48:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-03-30 23:48:19,690 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:19,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:48:19,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:48:19,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:19,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:19,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2029840949, now seen corresponding path program 1 times [2023-03-30 23:48:19,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528180470] [2023-03-30 23:48:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:19,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:19,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:48:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:20,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:20,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528180470] [2023-03-30 23:48:20,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528180470] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:20,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:20,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:48:20,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87074674] [2023-03-30 23:48:20,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:20,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:48:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:20,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:48:20,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:48:20,052 INFO L87 Difference]: Start difference. First operand 12184 states and 17633 transitions. Second operand has 7 states, 6 states have (on average 27.166666666666668) internal successors, (163), 4 states have internal predecessors, (163), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:48:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:48:31,432 INFO L93 Difference]: Finished difference Result 37596 states and 55301 transitions. [2023-03-30 23:48:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:48:31,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 27.166666666666668) internal successors, (163), 4 states have internal predecessors, (163), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 169 [2023-03-30 23:48:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:48:31,506 INFO L225 Difference]: With dead ends: 37596 [2023-03-30 23:48:31,507 INFO L226 Difference]: Without dead ends: 25418 [2023-03-30 23:48:31,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:48:31,533 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 5859 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 11344 mSolverCounterSat, 2113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5859 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 13457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2113 IncrementalHoareTripleChecker+Valid, 11344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:48:31,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5859 Valid, 956 Invalid, 13457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2113 Valid, 11344 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2023-03-30 23:48:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25418 states. [2023-03-30 23:48:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25418 to 23097. [2023-03-30 23:48:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23097 states, 22383 states have (on average 1.280302014922039) internal successors, (28657), 22485 states have internal predecessors, (28657), 92 states have call successors, (92), 92 states have call predecessors, (92), 621 states have return successors, (1845), 519 states have call predecessors, (1845), 91 states have call successors, (1845) [2023-03-30 23:48:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23097 states to 23097 states and 30594 transitions. [2023-03-30 23:48:31,866 INFO L78 Accepts]: Start accepts. Automaton has 23097 states and 30594 transitions. Word has length 169 [2023-03-30 23:48:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:48:31,867 INFO L495 AbstractCegarLoop]: Abstraction has 23097 states and 30594 transitions. [2023-03-30 23:48:31,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 27.166666666666668) internal successors, (163), 4 states have internal predecessors, (163), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:48:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 23097 states and 30594 transitions. [2023-03-30 23:48:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-03-30 23:48:31,869 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:31,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:48:31,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 23:48:31,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:31,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:31,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1900637997, now seen corresponding path program 1 times [2023-03-30 23:48:31,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:31,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791642467] [2023-03-30 23:48:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:31,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:32,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:32,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:48:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:32,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:32,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791642467] [2023-03-30 23:48:32,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791642467] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:32,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:32,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:48:32,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545920642] [2023-03-30 23:48:32,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:32,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:48:32,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:32,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:48:32,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:48:32,242 INFO L87 Difference]: Start difference. First operand 23097 states and 30594 transitions. Second operand has 7 states, 6 states have (on average 28.333333333333332) internal successors, (170), 4 states have internal predecessors, (170), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)